| author | moel.mich |
| Sun, 27 May 2012 16:08:54 +0000 | |
| changeset 346 | f652ab1e06e2 |
| permissions | -rw-r--r-- |
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using System; |
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using System.Collections.Generic; |
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using System.Text; |
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using System.Drawing; |
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using Aga.Controls.Properties; |
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using System.Windows.Forms; |
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using System.Windows.Forms.VisualStyles; |
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|
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namespace Aga.Controls.Tree.NodeControls |
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{
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internal class NodePlusMinus : NodeControl |
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{
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public const int ImageSize = 9; |
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public const int Width = 16; |
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private Bitmap _plus; |
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private Bitmap _minus; |
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|
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private VisualStyleRenderer _openedRenderer; |
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private VisualStyleRenderer OpenedRenderer |
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{
|
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get |
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{
|
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if (_openedRenderer == null) |
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_openedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened); |
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return _openedRenderer; |
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|
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} |
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} |
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|
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private VisualStyleRenderer _closedRenderer; |
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private VisualStyleRenderer ClosedRenderer |
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{
|
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get |
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{
|
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if (_closedRenderer == null) |
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_closedRenderer = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed); |
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return _closedRenderer; |
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} |
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} |
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|
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public NodePlusMinus() |
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{
|
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_plus = Resources.plus; |
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_minus = Resources.minus; |
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} |
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|
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public override Size MeasureSize(TreeNodeAdv node, DrawContext context) |
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{
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return new Size(Width, Width); |
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} |
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|
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public override void Draw(TreeNodeAdv node, DrawContext context) |
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{
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if (node.CanExpand) |
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{
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Rectangle r = context.Bounds; |
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int dy = (int)Math.Round((float)(r.Height - ImageSize) / 2); |
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if (Application.RenderWithVisualStyles) |
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{
|
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VisualStyleRenderer renderer; |
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if (node.IsExpanded) |
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renderer = OpenedRenderer; |
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else |
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renderer = ClosedRenderer; |
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renderer.DrawBackground(context.Graphics, new Rectangle(r.X, r.Y + dy, ImageSize, ImageSize)); |
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} |
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else |
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{
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Image img; |
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if (node.IsExpanded) |
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img = _minus; |
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else |
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img = _plus; |
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context.Graphics.DrawImageUnscaled(img, new Point(r.X, r.Y + dy)); |
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} |
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} |
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} |
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|
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public override void MouseDown(TreeNodeAdvMouseEventArgs args) |
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{
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if (args.Button == MouseButtons.Left) |
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{
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args.Handled = true; |
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if (args.Node.CanExpand) |
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args.Node.IsExpanded = !args.Node.IsExpanded; |
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} |
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} |
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|
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public override void MouseDoubleClick(TreeNodeAdvMouseEventArgs args) |
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{
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args.Handled = true; // Supress expand/collapse when double click on plus/minus |
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} |
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} |
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} |